linux-kernel - [PATCH 2/2] h8300: add missing definition for read_barries

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Message-Id: <1363883504-6140-2-git-send-email-jiang.liu@huawei.com>
Date:	Fri, 22 Mar 2013 00:31:44 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	Jiang Liu <jiang.liu@...wei.com>,
	Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	David Howells <dhowells@...hat.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] h8300: add missing definition for read_barries_depends()

Add missing definition for read_barries_depends() for h8300 to fix error:
kernel/task_work.c: In function 'task_work_cancel':
kernel/task_work.c:38:3: error: implicit declaration of function 'read_barrier_depends' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
make[1]: *** [kernel/task_work.o] Error 1
make: *** [kernel] Error 2

Cc: Yoshinori Sato <ysato@...rs.sourceforge.jp>
Cc: David Howells <dhowells@...hat.com>
Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
---
 arch/h8300/include/asm/barrier.h |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/h8300/include/asm/barrier.h b/arch/h8300/include/asm/barrier.h
index c7283c3..9e0aa9f 100644
--- a/arch/h8300/include/asm/barrier.h
+++ b/arch/h8300/include/asm/barrier.h
@@ -12,6 +12,8 @@
 #define wmb()  asm volatile (""   : : :"memory")
 #define set_mb(var, value) do { xchg(&var, value); } while (0)
 
+#define read_barrier_depends()	do { } while (0)
+
 #ifdef CONFIG_SMP
 #define smp_mb()	mb()
 #define smp_rmb()	rmb()
-- 
1.7.9.5

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